Gearing



Sept l5, 1931- J. E. JEWETTET AL 1,823,147

GEARING Filed sept. 23', 1925 2 Sheets-sheet l ro Q r r Il :fl ',y lq 5 p n "5 G O G) O c@ l I -0 j* i 'fr N ,l .gf f- A? w f f: f, N .IUI 5 9* :o Il:

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Sept. l5, 1931. E. JEWETT ET AL 1,823,147`

GEARING Filed Sept. 23 1925 2 Sheets-Sheet Patented Sept. 15, 1931 imi'rnnsraas f trici-3 JOSEPH E.;riiwnTT AND 'sinNnY n. Mareas, or BUFFALO', New YORK. AssiGNoRs l'io NnmioNaLnNiLiNn a enmarcan oo., iNo.,-oF Nnw Yon-K, N Y., n CORPORATION l or NEW YORK GEARING Application filed September 23, ,1925. Serialv No.` 58,057.

This invention relates to speed reduction gearing in which there is a change in the direction of the drive.

For dissimilar planes of shaft rotation, it

I is customary to use bevel gears with an overhang of one of the gears, thatV is, the gear has effective bearing support on one side only. vHowever, there is an inherent instability in the use of the overhanging 10 gear, as the gears tend toseparate and chatter, particularly when changeable loads are encountered. If, in addition to the bevel gears, further speed reduction isrequired, the customary bevel gearing necessitates an l association of the reducing gear elements entirely apart from it, resulting in a cumbersome and space occupying structure. Furthermore, in many applicationsof reduction gearing, substantial changes iny speed reduc- 20 tion are necessary.

This invention has for an object a gearing having a change in the direction of thei drive without overlianging gears. Another object is such a gearing that is combined with reduction gearing ina compact and ate its bearings, a skew bevel pinion 19. The

stable arrangement.V A further object is an arrangement providing a ready interchange of gears to coverV a wide range` of .speech changes. V In addition the invention con- 3 templates a construction that permits the removal of shafting without disturbing theA gearing or its mounting. These and other objects will appear from the following description.

In the drawings: Fig. 1 is a `vertical section of a gear asseinbly embodying the invention;

Fig. 2 is a horizontal section on the line o 2 2 of Fig. l, omitting the lower shaft and gear; and v,

' Figs. 3 and 4 are end views of the assembly. i

A substantially clust-proof oil retaining fw housing 1 has openings 2 and?) at either Aforming a bearing.

' stantially ..17 .andi 18.

end to receive bearings 4 and 5." Below the l plane of these openings and in the middle ofthe housing there extends another bearino- ;6 inade integral with vthe housing. A b oss "projects from the, bottom of the housing 10 and gear 11.k lAt the other. end,.the shaft 9 carries a spur gear 12, `and to the shaft 8 is secured an oil pump 13. A driving or stub shaft 14 is carried by thebeariiig 6, and

has al pinion 15 thereon in mesh with the gear 12. A coupling flange 16 on the end of the'shaft 14 provides attachment to a suitable driving means. With this arrt'ingeme'ntV of shafts, the drive is from the shaft 14,

through pinion 15 to gear 12, then through the shaft 9 tothe pinion 10. and gear l1 and shaft 8, two reductions inspeed being thusl provided. Thegears are covered by subdust-proof oil yretaining housings The shaft 8. has formed thereon` intermedipinion meshes with a complementary skew bevel gear 20. The gear is an annular disc and is bolted to a ai'ige 21 formed on a'driven shaft 22. `The shaft 22 extends.vr

perpendiculaily or in angular relation and in close proximity between the shafts 8and 9, and is journaled at its lower lend in the bearing` forniedin theboss 7. The upper end ofthe shaft 22 is lheld by a bearing 23-V Oarried by a casing 24 that is bolted to the housing 1. The endthrustof the shaft 22 is taken up by the end-bearings 25 and 26.

The shaft 22 is hollow and Vsecured Within it by a key 27, is a shaft'28, so that the 'shaft housed within cap 30. Side thrust on the` 28 is driven by'shaft 22`andl bothfshafts ments Lmounted therein.

shaft 28 is transmitted through the contact surfaces 31 and 32 on thehollow shaft 22 and thus to thebearings 7 and 23.

The end thrust bearings and 26 are held in place by the cap at the upper end and a plate 33 at the lower end, and the cap and the plate are so connected to the housing that they are interchangeable. By this means, the shaft 28 ymay be extended from either vend of the housing l, and the housing itself placed in any desiredposition. A deino'untable portion 34 of the cap permits withdrawal of the shaft V23 through thecap without disturbing the housing or the ele- As the parallel shaftsride in bearings that are fixed to the housing, and therefore in fixed relation to each other, the gears carried on the ends of these shafts may be interchanged. Numerous speed ratios` are therefore possible by merely changing'the spur gear lsets associating the shafts.

Moreover the bevel wheel, being a separate ring, can be substituted by another ring ofdiiferent size and pitch;A Substitution of a corresponding pinion requires ak withdrawal of the pinion-carrying shaft 8 and the substitution of another, and'l this is readily 4done by releasing the bearing lY and withdrawing' the shaft. Further. speed ratios are thus provided. VConsequently a Verywvide r'angeof speeds isf-thus possible with theinterehangeable bevel gears in assof ciation with the spur gear sets.

The entire mechanism runs in 'oil and the ump 13 is connected to draw oil from the ousing 1 anddisch'arge it into the cap 30.

tially iii a plane substantially paralle'lto The oii returns by gravity tothe housing 1.

The construction described gives-a stableV gear arrangement for changing the direc- 'ti'on of the drive, as the bevel pinion `Aand also the bevel 'gear are on shafts which Vrotate in bearings located oi'i both sides of lthe gears. Skewed ,gearing places Ithepinion shaft partly 'within the projected periphery f ,of the bevel gear and to oney side of the 'vertical shaft. This arrangement: in jconnection with reduction gearing "on either end of the pinion shaft gives 4ajconipact gearing, 'as the reduction gearing shafts are 'substanvthe bevel gear and in close proximitythereto (that is, thefreduction gearingshafts he 'substantially ina plane in proximity to the `direction changing gearing), andboth shafts and-reduction.gearingare approxiv ,mately within the spaceliniits required by the bevel gearing.. 1 Y f `Thenhollow shaft, by which the vdriven shaft is rotated aords a ineans for the v removal lor, disengagement ofl the driven sli-aft without Adisn/iaiitling the gearing or disturbing itsjinounting. -To do'so merely requiresthe removal of the .cap portioi'i 3i y and sliding the shaft through the eapf Alsothe parallel shafts are readily withdrawn by releasingone of the bearings in which they are mounted.

Gear changes are quickly made by reinoving the housing cover and withdrawing the )air and bevel Oearinf 'connecting saidfirst 7 D D D nained shaft and only one of saidppair.

2. Gearing comprising in combination a shaft a (fear on said shaft a )air of shafts on either si'desof `andin angular relation to said first named shaft, said pair extending within the ieriihe'r of said 'gear reducy D 3 tion gearing in proximity to said gear' periphery associating said pair, and 'gearing connecting said first named shaft and one of said pair.

3. `Gearing comprising in combination la casing, a shaft journaled in opposite sides of. said casing, a gear secured on said shaft n f'ithin the easing, a pairV of shafts oneither side of and in angularrelation vto's'aid fir'stf'55 nained shaft, said: pair being journaled in ysaid casing, vgearing in rclose proximity to said easing, associating said pair, and a Ypinion on one of said pair in mesh with -said gear: l Y

l. Gearing coniprisingin combination a casing, housings onei'ther side of said casing, oppositely 'disposed bearings in said casing in angular relation to said housings, a shaft journaled in said bearings, gears in said housings, shafts extending across said A*casingand connecting said gears, and gearinfyr `associating -the first ynamed shaft and one of the remaining shafts.

" 5.A A drive assembly 'comprising in oom-T110 Vbination a casing,'oppositely disposed bearingsin said casing, a shaft Journaled in said bearings, "a n pair of shafts 'supported by said casing in angular relation'to said shaft and.

Y on either side' thereof, a stub shaft mounted onzsaid casing, gearing associating said pair, gearing associating said rst named shaft and'one o'f'said pair, and gearing associating the stub shaft and the other of said pair.

` 6. A drive assembly comprising iny combination a casing, a driven shaft journaled in said casing, `a pair of shafts carried by and extending across said casing in angular relation to said driven shaft, a drive shaft sup-'7' .ported by said casing, ,gearing on one side of the'periphery of said casing associating said pair,gearing ,on-the opposite side of said casing associating ,said drive shaft and., one of said pair of shafts, and gearing within the casing associating the driven shaft and the other of said pair of shafts.

7. A drive assembly comprising a casing,

a hollow shaft having bearings in contact with opposite ends of said casing, gearing associated with said hollow shaft, a readily removable shaft within and keyed to said hollow shaft, and means mounted on the casing for restricting end movement of said removable shaft in either direction.

8. A drive assembly comprising a casing, a hollow shaft having bearings in contact with opposite ends of said casing, gearing associated with said shaft, a removable shaft within said hollow shaft, and means attachable to either end of said casing for restricting end movement of said removable shaft in either direction.

9. Gearing comprising in combination a casing, a hollow shaft jdurnaled in said casing, a skew bevel gear carried by said shaft, a removable shaft within and keyed to said hollow shaft, a pair of shafts upon either side of said hollow shaft lying in close proximity to said gear and substantially in a plane in angular relation to said hollow shaft, reduction gearing associating said pair of shafts, and a pinion carried by one of said pair of shafts cooperating with saidV bevel gear.

l0. Gearing comprising in combination a casing, a hollow shaft journaled in said casing, a skew bevel annular gear secured to .said shaft, a removable shaft within and keyed to said hollow shaft, removable and interchangeable thrust bearings for said shafts, parallel shafts journaled in said casing, said parallel shafts lying on either side of said hollow shaft and substantially in a plane parallel to said gear, a skew bevel pininterchangeable upon reversal of said within said casing,shafts extending through said casing, and reduction gearing mounted on said shafts on either exterior side of said casing, said shafts lying substantially in a plane in proximity to said gearing, and one ofsaid shafts being associated with said gearing.

In testimony whereofrwe affix Vour signatures.

JOSEPH E. JEWETT. SIDNEY E. MEYERS.

ion on one of said shafts cooperating with said gear, and removable gears associating said parallel shafts.

l1. A drive assembly comprising a casing, a hollow shaft having bearings 1n Contact with opposite ends of said casing, gearing associated with said hollow shaft, a readily removable shaft within and loosely keyed to said hollow shaft, and means mounted on the casing for separately restricting end movement of said hollow shaft ,and said removable shaft in either direction.

12. A drive assembly comprising a casing, a hollow shaft having bearings in contact with opposite ends of said casing, gearing associated with said hollow shaft, a removable shaft within and keyed to said hollow shaft, said removable shaft being adapted to be reversibly mounted within said hollow shaft, a casing cap enclosing one end of said removable shaft, a double thrust bearing for said removable shaft mounted in said cap,

and an oil retaining cap having anv opening ino 

